E-6
Applications Guide
NOTE
contains the effect of the variable output impedance control of the
Model 2306 on the current and voltage performance of a GSM handset.
Two methods are used to determine the impedance value of the cell or battery pack. The first
method uses data from the battery manufacturer or another source and is simply entered into the
Model 2306 from the front panel or over the GPIB bus. The second method involves a simple
series of measurements as follows.
Figure E-6
Li ion voltage drop during the transmit portion of the pulse
VH – VL = 0.348 V
NOTE
shows the voltage drop during the transmit portion of the pulse of a GSM
phone with the supplied Li ion.
shows the transient voltage response at the battery terminals with the handset
battery. Using the pulse current mode of the battery channel, the measured current during the
transmit portion of the data frame is I
H
= 1.536A and the idle portion of the data frame is
I
L
= 0.082A. To estimate R
i
from the measured voltage in
, use:
R
i
V
H
V
L
–
I
H
I
L
–
--------------------
0.348
V
1.454
A
-----------------
0.239
Ω
=
=
≅
Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176
TestEquipmentDepot.com
Summary of Contents for 2302
Page 2: ...Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com...
Page 4: ...Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com...
Page 16: ...Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com...
Page 22: ...Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com...
Page 344: ...Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com...
Page 346: ...Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com...
Page 347: ...Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com...